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I have a QStackedWidge t within a QDockWidget - depending on which page is shown I wish to show/hide the close button on the QDockWidget . I can do this by using QDockWidget::setFeatures() . However the issue I'm facing is how to capture the signal of the close button so that I can change the dock features / set the stacked widget page index. I have attempted to use an event filter: class EventFilter : public QObject { Q_OBJECT public: EventFilter( QObject* aParent ); protected: bool eventFilter(QObject *obj, QEvent *event); }; EventFilter::EventFilter( QObject* aParent ) : QObject( aParent ) { } bool EventFilter::eventFilter( QObject *obj, QEvent *event ) { if ( event->type() == QEvent::Close ) { return true; } return QObject::eventFilter( obj, event ); } And installed it as so: EventFilter* filter = new EventFilter( this ); u->dockWidget_6->installEventFilter( filter ); In the constructor of my QMainWindow - the eventFilter() method did not get called. So next I attempted to use the QDockWidget::visibilityChanged changed signal since it sounded like this might be what I wanted: connect( u->dockWidget_6, SIGNAL(visibilityChanged(bool)), SLOT(dockWindowClosed(bool)) ); This slot did get called - but not when the close button was clicked. Finally I attempted to use a promoted QDockWidget to capture the QWidget::closeEvent() . class DockWidgetWithCloseSignal : public QDockWidget { Q_OBJECT public: explicit DockWidgetWithCloseSignal(const QString &title, QWidget *parent = 0, Qt::WindowFlags flags = 0) : QDockWidget( title, parent, flags )

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